Berlin 2018 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 27: Poster Session I
MM 27.12: Poster
Dienstag, 13. März 2018, 18:30–19:45, Poster E
Dehydrogenation of the hydrogen storage material sodium borohydride — •Maik Szafarska1,2, Georgia Sourkouni - Argirusi1,2, and Wolfgang Maus - Friedrichs1,2 — 1Clausthaler Zentrum für Materialtechnik, TU Clausthal, Leibnizstr. 4, 38678 Clausthal - Zellerfeld, Germany — 2Institut für Energieforschung und Physikalische Technologien, TU Clausthal, Leibnizstr. 4, 38678 Clausthal - Zellerfeld, Germany
In the last decade, sodium borohydride (NaBH4) has attracted attention in energy storage research, caused by its high hydrogen density of 10.6 wt.% and relatively low cost, making it a potentially better hydrogen (and energy) storage unit compared to compressed hydrogen gas tanks and liquid hydrogen. Therefore it would be an improvement for fuel cell economy and energy storage. To accomplish this, NaBH4 has to be stabilized against decomposition through reaction with water in humid atmospheres and the dehydrogenation process must be understood properly, especially regarding NaBH4 decomposition during dehydrogenation. To investigate the dehydrogenation process and the desorbed components of the material, Thermogravimetric- and Multi Gas-Analysis were performed. The experimental results show correlations between particle size of the material and the desorption rate of hydrogen. In addition, a semi permeable membrane was used to successfully stabilize the NaBH4 against decomposition and analyzed for its influence on the hydrogen desorption process.